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Personally, as a sometimes imager, I hate them. They have ruined a number of my imaging exposures when waved about by people pointing things out in the sky. However they have a place for helping new people or the general public understand where things are if they are strictly visual (although I once had one aimed into the front of my big dob (accidently I am sure)). They are not an alternative to a good finderscope. If you get one then be very careful with its use when other scopes are around.
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